Bolt-gun



(No Model.) 2 Sheets-Sheet 1. H. LEINEWEBER.

BOLT GUN.

Patented Oct. 9,1894.

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BOLT GUN.

Patented Oct. 9,1894,

I .I/ r N UNITED STATES PATENT OFFICE.

HER-MAN LEINEWEBER, OF CHICAGO, ILLINOIS.

BOLT-GUN.

SPECIFICATION forming part of Letters Patent No. 527,369, dated October 9, 1894.

Application filed August 17, 1893- Serial No. 483,408- (No model.)

To all whom it may concern:

Be it known that I, HERMAN LEINEWEBER, a citizen of the United States, residing at Ohicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Firearms, of which the follow ing is a specification.

This invention relates to an improvement in the variety of small arms, in which a springcontrolled firing-pin is confined in a breech block adapted to be rocked back and forth by hand on its longitudinal axis for locking and unlocking it and setting the spring of the firing-pin and to be reciprocated lengthwise to open the breech for loading and advancing the cartridge into the barrel.

The object of this invention is to provide a gun in the class referred to, which shall involve the utmost simplicity in its construction to the exclusion of springs, except one for the firing-pin and one for the trigger and which shall, in consequence, be the least liable to impairment of the mechanism or to its becoming inoperative by use.

My invention consists in details of construction and combination of parts whereby my aforesaid object is attained.

In the accompanying drawings-Figure 1 is a broken view in longitudinal section of my improved gun, showing parts in elevation and the breech-block withdrawn to its full limit. Fig. 2 is a plan partly in section taken at the line 22 on Fig. 1 and viewed in the direction of the arrows. Fig.3 is a view like that presented in Fig. l, but showing more of the details of construction in sectional elevation, and the breech-block in the receiver. Fig. at is a broken sectional plan view of the rear portion of the receiver and showing the guide-slot extending behind it. Figs. 5, 6 and 7 are sectional views taken, respectively, at the line 5 on Fig. 3, and the lines 6 and 7 on Fig. 1, and viewed as indicated by arrows. Fig. Sis a broken view in side elevation showing the details of the cam-mechanism on the rear ends of the breech-block and firing-pin.

A denotes the stock and B is the barrel, neither of which involves any feature of novelty.

C is the receiver,in generally tubular form, having an elongated opening 0 on its right Side through which to insert a cartridge G in loading, and through which the shell of the discharged cartridge is thrown out, as hereinafter described. The barrel is screwed, at its rear end, into the forward end of the receiver, thereby presenting at the junction, in the receiver, an annular shoulder r, the obstructing tendency of which to the cartridge, in sliding the latter into the barrel by the forward movement of the reciprocating 1 breech-block D, it is one of the primary objects to overcome, and which is overcome by providing in the base of the receiver, adjacent to the opening 0, a depression 0 tapering toward its forward end and deepening toward its rear, flaring end, to approximate the shape of the cartridge which seats in it on being inserted into the breech through its said opening. The shape of the depression 0 is thus such, as to compensate for the taper of the cartridge, which, if its seat in the receiver were even throughout, would point against the shoulder r and be forced against the latter in shoving the cartridge into place by means of the reciprocating breech-block, the force of contact with the obstruction tending to disarrange and even loosen the connection between the bullet and shell of the cartridge. The depression 0 compensates for the taper of the cartridge in the sense that it deepens the seating toward the flaring end thereof sufficiently to cause the opposite end to point in the plane, or more toward the center, of the bore of the barrel, whereby, when the cartridge is shoved into the latter, it will clear the obstruction. The receiver 0 is internally enlarged, circumferentially, from near the rear end of the opening 0' for a sufficient distance backward to afford a rectangular circumferential groove g from which rectangular side-grooves 19 extend longitudinally of the receiver backward to its rear end. A rear extension E of the lower section of the receiver 0 contains in its base a central longitudinal rectangular groove 0, and is provided in its right side, at the rear end of the receiver, with a recess 0' to receive the lever G of the breech-block D, as hereinafter described. In the side of the receiver opposite that provided with the opening G, is a spring-dog 0 (Figs. 2 and 6) extending at its rear end through the wall of the receiver into the latter and having, at its opposite end, a button t by which to compress it against the spring t to withdraw the stop.

The breech-block D is in the form of a cylindrical tube containing the spring-controlled firing-pin D and adapted to fit inside and be reciprocated lengthwise, and turned back and forth on its longitudinal axis in the receiver, being held, normally, from withdrawal by the stop 25 of the spring-dog 0 extending into a longitudinal groove n in a side of the breech-block and which has a right-angular termination n at its rear end to permit turning of the breech-block on its longitudinal axis to lock it. through the medium of the ears m, m, on opposite sides of the breech-block behind the plane of the groove-termination n and which enter the guide-grooves p in the sides of the breech when the breech-block is being inserted therein, but which are in the circumferential groove q'when the breech-block is fully inserted, whereby it may be turned, through the medium of the usual lever G, on its longitudinal axis to bringthe ears m respectively in the upper-and lower portions of the groove q, wherein they are out of coincidence with the guide-grooves p and confined in the circumferential groove to lock the breech-block in the receiver. When the breech-block is thus turned toward the right; after being insertedin the receiver, to lock it therein, the shank of the lever G enters the notch or'recess 0'. g The firing-pin D'- is of" the usual general;

of the breech-block. The spring Dflwhichl 'is coiled around the firing-pin to control it;

is confined between the rear end of the pin, the last turn of the spring adjacent to the head 00', however, being extended at itsl end 1; into a longitudinal groove '0 in the wall? of 1 the breech-block, fora ten-described. 1, Near its rear end, the firing-pin is reduced purpose hereinaf-g l and flattened on opposite sides, as shown at;

I a in-Figs. 8 and 5,'and on this reduced por-;

tion fits'a sleeve F, held in place by a nut 5 engagingthe thread I) and forming the rear;

termination of the firing-pin. The'sleeve F- carr-iesa rigid cam Z to engage with an opposingcam-surface Z formed'on the rear end of "the breech-block, which terminates-at its cent tothe lever G, is a well-known form of' pivoted safety-catch G to lock the firing-pin against operation when set for firing and in case of being accidentally releasedby the trigger.

H is the trigger-mechanism, comprising the finger-portion 2', pivotally connected at s with. the rear end of a lever h fulcrumed between The locking is effected its ends on the base of the receiver 0 to extend lengthwise thereof. The lever h terminates at one end in a stop-lug k which projects upward through the breech-extension E into the groove 0, thus into the path of the lug k on the rear end of the firing-pin; and at its opposite end the lever h terminates in a head h affording a socket to confine a spi ral spring 9 in its seat g in the under side of the breech O. The trigger-finger t'is extended backward, at its upper end, to form bearings f and f, which afford two fulcrums against the base ofthe part E, operating successively in pulling the trigger.

The head of the tubular breech -block, which may be screwed into place, as represented, (and which has its central aperture w formed in the shape of the pointed end of the firing-pin) terminates, in line with the longitudinal groove 'n, in a forward projecting lip e, and directly opposite in the side of the breech-block is formed a longitudinal groove d having fastened in it a flat spring d projecting at its forward end beyond the head of the breech-block in the form of alip e toco-operate with the opposing lip e tov engage the rim at the rear end of a cartridge and afford an extractor for the shell. Immediately adjacent to the lip e, a loosely reciprocating pin 0 coincident with the groove n extends through the breech-block head from a recess or chamber 0' formed at the rear of said head at the end of the .groove n where a head 0 on the inner end of the pin projects form, being adaptedto Work, at its pointedf end, through a central openinga: in the head through the plane of the groove flush with the circumference of the'cylindrical breechblock.

The operations of loading andfiring thegun are performed as follows: The breech-block being in place, having been inserted into the receiver 0, and turned to the right to lock it therein (presumably after the gun has been fired) it next devolves upon the operator to set the firing-pin and withdraw andthrow out the-shell of the spent cartridge preparatory to reloading and again firing. The first operation is to turn the breech-block, by its handle G, toward the left. As theprimary result of this, the cam-face Z on the end of the breech-block, by the turning'of the latter, works against the opposing cam Z onthe firing-pin, which cannot turn owing to'the lugkbeing confined in the groove 0. Hence the pin is cammed backward, compressing and thus setting the spring D until the cam the lips e and e on the fiangeof the cartridge shell, pulls the latter out of the barrel into the receiver 0; and when the breech-block reaches the extremity of its withdrawal, the limiting lug t in the groove n is struck by the head 0 of the pin 0, thereby driving the latter suddenly forward and forcing the shell from the grip of the holding-lips e and e, and out through the side-opening C in the receiver. Then a cartridge 0 may be inserted, through the side-opening 0, into its seat 0 in the receiver C, and by sliding the breech-block longitudinally inward it shoves the cartridge ahead of it into the barrel B, meantime having gripped the flange between the lips e, c. When the breech-block has thus been inserted it is turned to cause the ears m, m to lock it as described. However this turning of the breech-block, while it separates the cam-face Z from the cam Z, does not release the firing-pin, since the latter is held set by the abutment of the lug 70 against the spring stop k of the trigger-mechanism. On pulling the trigger, whereby the stop is is depressed out of the path of the lug 7c, the firing-pin is freed, to be shot forward by the recoil of its controlling-spring, to fire the cartridge.

In turning the breech-block toward the left to set the firing-pin spring, the tendency of the latter would be to unwind, were it not for retaining the end 1; thereof in the slot 1;, Whereby such unwinding tendency is not only prevented, but the tension of the spring, in setting, is exerted to tend to force the cam Z in the direction toward its seating-shoulder 1*.

What I claim as new, and desire to secure by Letters Patent, is

In a gun, the combination with the barrel, stock and suitable trigger-mechanism, of an interposed receiver 0 in the forward end of which the rear end of the barrel is fastened, a reciprocating breech-block confined in the receiver to turn on its longitudinal axis, and provided with an internal longitudinal groove 1), a firing-pin D, in the breech-block, having a controlling-spring D confined upon it with one end 11' thereof confined in the groove 0;, locking-means at the rear end of the breech-block operated by turning it in the receiver, and cam-mechanism at the rear ends of the firing-pin and breech-block, cooperating, by turning the breech-block to unlock it, to set the spring of the firing-pin, substantially as described.

HERMAN LEINEWEBER.

In presence of- J. W. DYRENFORTH, W. N, WILLIAMS. 

